Propeller



Feb. 28, 1933. A sou- 1,899,646

PROPELLER Filed Aug. 2, 1932 l 2 Sheets-Sheet 1 Inventor.

Feb. 28, 1933. I A. SOUTIER 1,899,646

PROPELLEF Filed Aug. 2, 1932 2 Sheets-Sheet 2 N i B 2 I I5 InventorPatented Feb. 28, 1933' UNITED, STATES ,ALFRED SOUTIEB, OF QUINCY,MASSACHUSETTS;

PBOPELLER Application filed August 2, 1932; Serial 1%-627377.

This invention relates to a propeller which is intended for general useand has for one of its important objects to provide, in a manner ashereinafter set forth, a propeller em- 5 bodying a novel construction,combinat1on and arrangement of parts through the medlum of which theslip stream will be thrown rearwardly and outwardly around the fuselageof the aeroplane, thereby materially lowering head resistance. v

Another important object of the invention is to provide a propeller ofthe aforementioned character including novel means for detachablymounting the blades on the propeller shaft.

Another important object of the invention is to provide an aeroplanepropeller including a novel combination and arrangement of bladesthrough the medium of which maximum efficiency will be had.

Other objects of the invention are to provide a propeller of thecharacter described which will be simple in construction, strong,durable, reliable in use and which may be 5 manufactured at low cost.

All of the foregoing and still further objects and advantages of theinvention will become apparent from a study of the followingspecification, taken in connection with the accompanying drawingswherein like characters of reference designate corresponding partsthroughout the several views, and wherein:

Figure l is a view in side elevation, showing a propeller constructed inaccordance with the present invention.

Figure 2 is a view in front elevation thereof.

Figure 3 is a View in side elevation showing the propeller mounted on anaeroplane.

Figure 4 is a view in vertical transverse section, taken substantiallyon the line 44 of Figure 1.

Referring now to the drawings in detail, it will be seen that thereference numeral 1 designates a conventional aeroplane from the noseportion 2 of which a propeller shaft 3 projects. On the forwardend'portion of the shaft 3 is a circular head 4 having notches orrecesses 5 in diametrically opposite sides verging, outwardly curvedblades. 6. The

peller, constitutes means for bracing the thereof. Th'ehead 4constitutes what may termedt-hehub of; the propeller. v Mounted on theheadl4 are forwardly diinner end'soflthe blades 6' are provided withshanks-7 which are engaged in the notches or recesses 5 of the head 4.At their free ends the shanks 7 terminate in inturned lips 8 which areengaged with the rear face of the head 4. A retaining ring 9 is mountedon the head 4 for securing the shanks 7 in the notches or recesses 5.The retaining ring 9 is secured in position on the head 4through themedium of a set screw 10.

On the rear sides and on the outer portions of the blades 6 arereversely curved fins 11. While the fins 11 are shown integral with theblades 6, itwill be understood that said fins may be separate from theblades and secured thereon in any suitable manner.

Extending between the forward portions of the blades 6 and secured, atits ends, to said blades, as at 12', is a substantially spirally twistedstrut which is designated generally by the reference numeral 13. Thestrut l3 constitutes a pair of integral propeller blades 14 which areconnected by a reduced intermediate portion 15. As will be apparent, thestrut 13 in addition to functioning as a problades 6.

It is believed that the many advantages of a propeller constructed inaccordance with the present inventionwill be readily understood, andalthough the preferred embodiment of the invention is as illustrated anddescribed, it is to be understood that changes in the details ofconstruction and in the combination and arrangement of parts may beresortedto which will fall within the scope of the invention as claimed.

WVhat is claimed is:

1. A propeller comprising a pair of blades, and means for mounting theblades on a propeller shaft, said means including a head fixed on theshaft and having notches in diametrically opposite sides thereof, shankson the inner ends of the blades engaged in the notches, inturned lips onthe free ends of the shanks engaged with the head, a ring encir:

2 rename;

cling the head and shanks for retaining said shanks in the notches, andmeans for securing the ring on the head. 2. A propeller comprising ahub, a pair 7 of diverging, outwardly curved blades mounted on the hub,substantially reversely curved Jim on the rear sides of the blades, anda substantially spirally twisted strut extending between the outerportions of the blades and connected thereto.

3. In combination-with ashaft, a propeller mounted on said shaft, saidpropeller in eluding a pair of diverging blades mounted on one endportion of the shaft and project ing beyond said one end of the shaft,and a spirally twisted strut extending between outer portions of theblades and connected at its ends thereto, said strut being spaced.

from said one end of the shaft. 0 In testimony whereof I aflix mysignature.

ALFRED 'SOUTIER.

